One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,8)(9,10,15,19)(11,16,20,22)(12,14,18,24)(13,17,23,21)(25,26)(27,33)(28,36)(29,32)(30,35)(31,38)(34,39)(37,40)(1,2,4,6)(3,5,8,7)(9,11)(10,16)(12,21)(13,14)(15,20)(17,18)(19,22)(23,24)(25,27)(26,30)(28,34)(29,35)(31,39)(32,33)(36,40)(37,38)(1,2)(3,5)(4,6)(7,8)(11,20)(13,23)(16,22)(17,21)(25,26,29,32)(27,30,35,33)(28,31,38,36)(34,39,37,40)(1,3)(2,5)(4,8)(6,7)(9,12)(10,14)(11,21)(13,16)(15,18)(17,20)(19,24)(22,23)(25,27)(26,30)(28,37)(29,35)(31,40)(32,33)(34,38)(36,39) involution — undirected(9,13)(10,17)(11,14)(12,22)(15,23)(16,18)(19,21)(20,24)(25,26)(27,33)(28,31)(29,32)(30,35)(34,40)(36,38)(37,39) involution — undirected(9,14)(10,18)(11,13)(12,19)(15,24)(16,17)(20,23)(21,22)(25,28)(26,31)(27,34)(29,38)(30,39)(32,36)(33,40)(35,37) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.